Run examples as part of test suite

[jonbiemond]

Run all files in /Examples as a test.

Resolves #294

[jonbiemond]

As mentioned in #294, I don't love that these add +2 minutes to the time it takes to run tests. One option is to skip them by default while still including them in CI.

[JWock82]

I do accidentally break the examples from time to time when refactoring parts of pynite. It would be nice to have a warning that that has happened so I can update the examples too.

[jonbiemond]

Awesome, I'll figure out why the test fails on older version of Python.

[JWock82]

I’ve updated the required NumPy version. Pynite 2.0.3 now requires NumPy ≥ 2.4.0. Recent changes in NumPy’s array handling were causing issues in Visualization.py, which have now been addressed. Pynite is compatible with the latest NumPy release.

If compatibility issues arise with Python 3.10 or 3.11 due to NumPy 2.4.0, we may drop support for those Python versions in a future release.

[JWock82]

I just verified from my testing logs that numpy 2.2.6 is the highest version of numpy supported by Python 3.10. I'll be dropping support for 3.10 in the next release. 3.11 will be the minimum going forward.

[jonbiemond]

I struggling to figure out the error with the Shear Wall - Basic example. It works fine if I run it manually as a script. I updated the test to skip that file if the python version <= 3.11 as a workaround.